vout.m

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/*****************************************************************************
 * vout.m: MacOS X video output module
 *****************************************************************************
 * Copyright (C) 2001-2003 VideoLAN
 * $Id: vout.m,v 1.85 2004/02/28 13:53:35 titer Exp $
 *
 * Authors: Colin Delacroix <[e-mail]>
 *          Florian G. Pflug <[e-mail]>
 *          Jon Lech Johansen <[e-mail]>
 *          Derk-Jan Hartman <[e-mail]>
 *          Eric Petit <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <string.h>                                            /* strerror() */

#include <QuickTime/QuickTime.h>

#include <OpenGL/OpenGL.h>
#include <OpenGL/gl.h>
#include <OpenGL/glext.h>

#include <vlc_keys.h>

#include "intf.h"
#include "vout.h"

#define QT_MAX_DIRECTBUFFERS 10
#define VL_MAX_DISPLAYS 16

#define OPENGL_EFFECT_NONE             1
#define OPENGL_EFFECT_CUBE             2
#define OPENGL_EFFECT_TRANSPARENT_CUBE 4

struct picture_sys_t
{
    void *p_info;
    unsigned int i_size;

    /* When using I420 output */
    PlanarPixmapInfoYUV420 pixmap_i420;
};

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/

static int  vout_Init      ( vout_thread_t * );
static void vout_End       ( vout_thread_t * );
static int  vout_Manage    ( vout_thread_t * );
static void vout_Display   ( vout_thread_t *, picture_t * );

static int  CoSendRequest      ( vout_thread_t *, SEL );
static int  CoCreateWindow     ( vout_thread_t * );
static int  CoDestroyWindow    ( vout_thread_t * );
static int  CoToggleFullscreen ( vout_thread_t * );

static void VLCHideMouse       ( vout_thread_t *, BOOL );

static void QTScaleMatrix      ( vout_thread_t * );
static int  QTCreateSequence   ( vout_thread_t * );
static void QTDestroySequence  ( vout_thread_t * );
static int  QTNewPicture       ( vout_thread_t *, picture_t * );
static void QTFreePicture      ( vout_thread_t *, picture_t * );

/*****************************************************************************
 * OpenVideo: allocates MacOS X video thread output method
 *****************************************************************************
 * This function allocates and initializes a MacOS X vout method.
 *****************************************************************************/
int E_(OpenVideo) ( vlc_object_t *p_this )
{   
    vout_thread_t * p_vout = (vout_thread_t *)p_this;
    OSErr err;
    int i_timeout;

    p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
    if( p_vout->p_sys == NULL )
    {
        msg_Err( p_vout, "out of memory" );
        return( 1 );
    }

    memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );

    /* Wait for a MacOS X interface to appear. Timeout is 2 seconds. */
    for( i_timeout = 20 ; i_timeout-- ; )
    {
        if( NSApp == NULL )
        {
            msleep( INTF_IDLE_SLEEP );
        }
    }

    if( NSApp == NULL )
    {
        /* no MacOS X intf, unable to communicate with MT */
        msg_Err( p_vout, "no MacOS X interface present" );
        free( p_vout->p_sys );
        return( 1 );
    }

    if( [NSApp respondsToSelector: @selector(getIntf)] )
    {
        intf_thread_t * p_intf;

        for( i_timeout = 10 ; i_timeout-- ; )
        {
            if( ( p_intf = [NSApp getIntf] ) == NULL )
            {
                msleep( INTF_IDLE_SLEEP );
            }
        }

        if( p_intf == NULL )
        {
            msg_Err( p_vout, "MacOS X intf has getIntf, but is NULL" );
            free( p_vout->p_sys );
            return( 1 );
        }
    }

    p_vout->p_sys->b_mouse_moved = VLC_TRUE;
    p_vout->p_sys->i_time_mouse_last_moved = mdate();

    /* set window size */
    p_vout->p_sys->s_rect.size.width = p_vout->i_window_width;
    p_vout->p_sys->s_rect.size.height = p_vout->i_window_height;

    /* Check if we should use QuickTime or OpenGL */
    p_vout->p_sys->i_opengl = config_GetInt( p_vout, "macosx-opengl" );

    if( !p_vout->p_sys->i_opengl )
    {
        /* Initialize QuickTime */
        p_vout->p_sys->h_img_descr = 
            (ImageDescriptionHandle)NewHandleClear( sizeof(ImageDescription) );
        p_vout->p_sys->p_matrix =
            (MatrixRecordPtr)malloc( sizeof(MatrixRecord) );
        p_vout->p_sys->p_fullscreen_state = NULL;

        if( ( err = EnterMovies() ) != noErr )
        {
            msg_Err( p_vout, "EnterMovies failed: %d", err );
            free( p_vout->p_sys->p_matrix );
            DisposeHandle( (Handle)p_vout->p_sys->h_img_descr );
            free( p_vout->p_sys );
            return( 1 );
        } 

        /* Damn QT isn't thread safe. so keep a lock in the p_vlc object */
        vlc_mutex_lock( &p_vout->p_vlc->quicktime_lock );

        err = FindCodec( kYUV420CodecType, bestSpeedCodec,
                            nil, &p_vout->p_sys->img_dc );
        
        vlc_mutex_unlock( &p_vout->p_vlc->quicktime_lock );
        if( err == noErr && p_vout->p_sys->img_dc != 0 )
        {
            p_vout->output.i_chroma = VLC_FOURCC('I','4','2','0');
            p_vout->p_sys->i_codec = kYUV420CodecType;
        }
        else
        {
            msg_Err( p_vout, "failed to find an appropriate codec" );
        }

        if( p_vout->p_sys->img_dc == 0 )
        {
            free( p_vout->p_sys->p_matrix );
            DisposeHandle( (Handle)p_vout->p_sys->h_img_descr );
            free( p_vout->p_sys );
            return VLC_EGENERIC;        
        }
    }

    NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
    NSArray * o_screens = [NSScreen screens];
    if( [o_screens count] > 0 && var_Type( p_vout, "video-device" ) == 0 )
    {
        int i = 1;
        vlc_value_t val, text;
        NSScreen * o_screen;

        int i_option = config_GetInt( p_vout, "macosx-vdev" );

        var_Create( p_vout, "video-device", VLC_VAR_INTEGER |
                                            VLC_VAR_HASCHOICE ); 
        text.psz_string = _("Video device");
        var_Change( p_vout, "video-device", VLC_VAR_SETTEXT, &text, NULL );
        
        NSEnumerator * o_enumerator = [o_screens objectEnumerator];

        while( (o_screen = [o_enumerator nextObject]) != NULL )
        {
            char psz_temp[255];
            NSRect s_rect = [o_screen frame];

            snprintf( psz_temp, sizeof(psz_temp)/sizeof(psz_temp[0])-1, 
                      "%s %d (%dx%d)", _("Screen"), i,
                      (int)s_rect.size.width, (int)s_rect.size.height ); 

            text.psz_string = psz_temp;
            val.i_int = i;
            var_Change( p_vout, "video-device",
                        VLC_VAR_ADDCHOICE, &val, &text );

            if( ( i - 1 ) == i_option )
            {
                var_Set( p_vout, "video-device", val );
            }
            i++;
        }

        var_AddCallback( p_vout, "video-device", vout_VarCallback,
                         NULL );

        val.b_bool = VLC_TRUE;
        var_Set( p_vout, "intf-change", val );
    }
    [o_pool release];

    if( CoCreateWindow( p_vout ) )
    {
        msg_Err( p_vout, "unable to create window" );
        if( !p_vout->p_sys->i_opengl )
        {
            free( p_vout->p_sys->p_matrix );
            DisposeHandle( (Handle)p_vout->p_sys->h_img_descr );
        }
        free( p_vout->p_sys ); 
        return( 1 );
    }

    p_vout->pf_init = vout_Init;
    p_vout->pf_end = vout_End;
    p_vout->pf_manage = vout_Manage;
    p_vout->pf_render = NULL;
    p_vout->pf_display = vout_Display;

    return( 0 );
}

/*****************************************************************************
 * vout_Init: initialize video thread output method
 *****************************************************************************/
static int vout_Init( vout_thread_t *p_vout )
{
    int i_index;
    picture_t *p_pic;

    I_OUTPUTPICTURES = 0;

    /* Initialize the output structure; we already found a codec,
     * and the corresponding chroma we will be using. Since we can
     * arbitrary scale, stick to the coordinates and aspect. */
    p_vout->output.i_width  = p_vout->render.i_width;
    p_vout->output.i_height = p_vout->render.i_height;
    p_vout->output.i_aspect = p_vout->render.i_aspect;

    if( !p_vout->p_sys->i_opengl )
    {
        SetPort( p_vout->p_sys->p_qdport );
        QTScaleMatrix( p_vout );

        if( QTCreateSequence( p_vout ) )
        {
            msg_Err( p_vout, "unable to create sequence" );
            return( 1 );
        }
    }
    else
    {
        p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
        p_vout->output.i_rmask  = 0xFF0000;
        p_vout->output.i_gmask  = 0x00FF00;
        p_vout->output.i_bmask  = 0x0000FF;
    }

    /* Try to initialize up to QT_MAX_DIRECTBUFFERS direct buffers */
    while( I_OUTPUTPICTURES <
           p_vout->p_sys->i_opengl ? 1 : QT_MAX_DIRECTBUFFERS )
    {
        p_pic = NULL;

        /* Find an empty picture slot */
        for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
        {
            if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
            {
                p_pic = p_vout->p_picture + i_index;
                break;
            }
        }

        /* Allocate the picture */
        if( p_pic == NULL )
        {
            break;
        }

        if( !p_vout->p_sys->i_opengl )
        {
            if( QTNewPicture( p_vout, p_pic ) )
            {
                break;
            }
        }
        else
        {
            /* Nothing special to do, we just need a basic allocated
               picture_t */
            vout_AllocatePicture( VLC_OBJECT( p_vout ), p_pic,
                    p_vout->output.i_chroma, p_vout->output.i_width,
                    p_vout->output.i_height, p_vout->output.i_aspect );
        }

        p_pic->i_status = DESTROYED_PICTURE;
        p_pic->i_type   = DIRECT_PICTURE;

        PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;

        I_OUTPUTPICTURES++;
    }

    if( p_vout->p_sys->i_opengl )
    {
        [p_vout->p_sys->o_glview lockFocus];
        [p_vout->p_sys->o_glview initTextures];
        [p_vout->p_sys->o_glview reshape];
        [p_vout->p_sys->o_glview unlockFocus];
    }

    return( 0 );
}

/*****************************************************************************
 * vout_End: terminate video thread output method
 *****************************************************************************/
static void vout_End( vout_thread_t *p_vout )
{
    int i_index;

    if( !p_vout->p_sys->i_opengl )
    {
        QTDestroySequence( p_vout );
    }
    else
    {
        [p_vout->p_sys->o_glview cleanUp];
    }

    /* Free the direct buffers we allocated */
    for( i_index = I_OUTPUTPICTURES; i_index; )
    {
        i_index--;
        if( !p_vout->p_sys->i_opengl )
        {
            QTFreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
        }
        else
        {
            free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
        }
    }
}

/*****************************************************************************
 * CloseVideo: destroy video thread output method
 *****************************************************************************/
void E_(CloseVideo) ( vlc_object_t *p_this )
{       
    vout_thread_t * p_vout = (vout_thread_t *)p_this;     

    if( CoDestroyWindow( p_vout ) )
    {
        msg_Err( p_vout, "unable to destroy window" );
    }

    if( !p_vout->p_sys->i_opengl )
    {
        if ( p_vout->p_sys->p_fullscreen_state != NULL )
            EndFullScreen ( p_vout->p_sys->p_fullscreen_state, NULL );

        ExitMovies();

        free( p_vout->p_sys->p_matrix );
        DisposeHandle( (Handle)p_vout->p_sys->h_img_descr );
    }

    free( p_vout->p_sys );
}

/*****************************************************************************
 * vout_Manage: handle events
 *****************************************************************************
 * This function should be called regularly by video output thread. It manages
 * console events. It returns a non null value on error.
 *****************************************************************************/
static int vout_Manage( vout_thread_t *p_vout )
{
    if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
    {
        if( CoToggleFullscreen( p_vout ) )  
        {
            return( 1 );
        }

        p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
    }

    if( p_vout->i_changes & VOUT_SIZE_CHANGE ) 
    {
        if( !p_vout->p_sys->i_opengl )
        {
            QTScaleMatrix( p_vout );
            SetDSequenceMatrix( p_vout->p_sys->i_seq, 
                                p_vout->p_sys->p_matrix );
        }
 
        p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
    }

    /* hide/show mouse cursor 
     * this code looks unnecessarily complicated, but is necessary like this.
     * it has to deal with multiple monitors and therefore checks a lot */
    if( !p_vout->p_sys->b_mouse_moved && p_vout->b_fullscreen )
    {
        if( mdate() - p_vout->p_sys->i_time_mouse_last_moved > 3000000 )
        {
            VLCHideMouse( p_vout, YES );
        }
    }
    else if ( p_vout->p_sys->b_mouse_moved && p_vout->b_fullscreen )
    {
        VLCHideMouse( p_vout, NO );
    }
    
    /* disable screen saver */
    UpdateSystemActivity( UsrActivity );
    
    return( 0 );
}

/*****************************************************************************
 * vout_Display: displays previously rendered output
 *****************************************************************************